Steam-turbine.



PATENTED MARJZV, 1906.

G.'F.B ARTH STEAM TURBINE. APPLICATION FILED SEPT. 14, 1905. I

WI'INESSES:

ATTORNEY.

- trifugal force be thrown out. To prevent T0 o/ZZ whom it may concern:

- intranesra Es OHARLEsE :sAarn, OE MILWAUKEE, Wiscons n, assronoa To Annie- CHALMERS COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF NEW JERSEY.

steam-rename;

No. erases.

Be it known that I, Cnsniins F. Burma citizen of the United States, residin at Milwaukee, in the county of Milwau es and "State of Wisconsin, have invented certain new and useful Improvements in Steam-'Tur bines, of which the following is a specification. w J

This invention relates to securing or call;-

-ing1strips, andmore especially to those used in olding the blade-rings in turbines. In the operation of calking soft metal when force is applied to distort the material I have found that the flow begins at the angles. For ease in causing this flow it is desirable that it shall occur through a minimum of the material. Furthermore, in any calking it is desirable that the fit shall be ti ht for the entire depth of the groove. T 's is particularly essential in setting the blade-rin s of steam-turbines. For example, if the t is tight at the top of the groove only it will tend to tilt the blades out of true and thereby render liable the wrecking of the machine, owing to the close clearances.

sides with an edgenear a locking portion of the. groove I located so that "the .material is driven but a minimum distance I have taken.

advantage of the above I useful facts. stri initself has these-general advantages an in the particular combination disclosed produces a result never heretofore attained,

there being such peculiar cooperation ofthe parts wherebythe securingrsti'ip is not. only easily forced into position, but readilylocks the blade-rings. j v In the accompanying drawings, Figure;,-1is a section of severa rings of bladesinafturbine of'the Parsons type. I Fig. 2 enlarged section through-one of the'ii'ings or blades attached to-the spindle or rotor.

3 is an enlarged seotional view' of the securing or calkin strip. Figs. 4, 5, and'6 show forms of the ockin -recess in the side of the groove of-the spind e or rotor.

The s indle or rotor 1 of the turbineis within t e cylinder in stator 2. The spindle i carries the blades 3, having at their outer ends the battle 4. .-The bases of the blades 3 are rigidly fixed in the strip or vise-ring 5. These rings of blades mounted on: the s indle in operationhave a tendencythroug cen- Speoification of Letters Patent. Application filed september l, 1905-. Serial No. 278,369.

y P d ng a'calking-strip with a close slip fit along the T Patented march 27, moo.

this, Ihave formed thegroove 10 with a tapering side -11 thus producing 'a groove broader at theldo'ttorn. Theo posite side wall of the groove is also forms with soontinu'ous locking-recess, as 13, 13*, 01*13, near i its top, so that it will be necessary to cause themetal to How through but a minimum distance in calking. At :the base of the groove are cut-out portions 12 and 14, so that better fit may be obtained at the corners. The beveled side of the ring 5 is placed against theside 11 of the groove 10, and this leaves between the ring5 and the opp'osite perpendicular walloi t e groove lO a paralel-sided space, In this space is placed the soft-metal calling-strip 6. This stri has a rounded bottom 61 and a' long beve ed side 62, which is lacedffaoing the ring 5: 0 posite the beve ed side 62 the stri 6 hasa s ort placed in position'in the space between the ring 5 and the perpendicular side :of'the I beveled side 63 and betWeenQt ese two-bev eled sides the rounded portionfit. When.

'64, the metal-flowbegins aftthis ed e of the I bevel 63 lying in the recess; serves at o era aa er t t e beveled side 62iagainstffthe r ing5. The

close slip "iii; of this securing-strip. rc ludes mp ys e ies 5- e s l By this operation the; of blades -is. securely and'rigidly looked inthe. s indleggioef e; In

one side inclined to the- 'top or bottom-andthe other per iilandiculanthe inclined side fitting against t e rin 7. Between the ring-7 an lonce to lock .the strip. infosition. Mean-j v'vhile the strip is forcedto theibottom of finishing, the exoess-of thenietalofthe secur then outer endstheibsifiie 9; As the cylinder the perpendic a1 side of the groove-isle parallel-sided space securing-strip 6, which has a close slip fit therein. After calking it is dressed down, as shown at 68 in Fig. 1.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A securing-strip having an edge at an intermediate flow portion.

2. A metallic securing-strip having a forceapplying face, and a metal-How edge near the force-applying face.

3. A metallic securing-stri having a beveled side and a pair of paralle engaging sides.

4. Aturbine-blade-ring-securing strl having a beveled side and a pair of paral el engaging sides.

5. A member having a groove, a strip entering said groove and leaving aparalle'l-sided space in the groove, and a securmg-strip having a beveled side in the parallel-sided space'.

6. A member having a groove provided with a recess, a rigid stri entering the groove and leaving aparallel-si ed space, and a closeslip-iit securing-strip in said parallel-sided space and adjacent said recess.

7. A member having a groove with a perendicular side, a strip entering said groove eaving a parallel-sided space, and a securingstrip non-rectangular in cross-section in said space.

8' A member having a groove with a perpendicular side, a strip'entering said groove and leaving a parallel-sided space, and a malleable securing-strip having rounded portions whereby the strip may be readily forced into locking position in said space.

9. A member having a groove provided with a lockingrecess, a strip having a perpendicular side entering said groove and leaving a parallel-sided space adjacent said recess, and a malleable securing-strip in said space.

10. A member having an endless groom, a rigid strip entering said groove and caving a into which is placed the parallel-sided space, and a securing-strip havlng a beveled portion whereby the strip may be readily forced into locking position in said space.

11. A rotary mernber having a peripheral groove dprovidedj-Wfih a-Iecess, a stri entering sai groove arid" a paral el-sided space, and a inalleablejspuriirg-strip having a bevel terminating near the recess whereby the strip may be forced; locking position in said spa p 12. rotor havin agroov rovided with a recess, a blade ho entering said groove and leaving a parallel sided space, and a securing-strip havinga bevel terminat ing near the recess, said strip having a close slip fit in said space.

13. Arotor having a peripheral groove provided with a continuous recess in a sidewall, a blade-holdin ring entering said groove and leaving a parallel-sided space, and a malleable securing-strip having four obtuse an Ice whereby the strip may be forced more rea 'ily into locking position in said space.

14. A rotor having a peripheral groove formed with a tapering side and a per .end icular side, there being a recess in t e perpendicular side, a blade-holding ring fitting against the tapering side, and a soft-metal securing-strip having an ed e at the recess in the per ndicnlar side of t e groove.

15. rotor having a groove with a radial side and a recess, a blade-holding ring in said groove and securing means adjacent said recess for said ring.

16. A rotor having a groove with a radial side and a locking-recess, blades mounted in said groove and means adjacent said recess to rigid y secure the blades.

In testimony whereof I afix my signature in presence of two witnesses.

CHARLES EARTH. 'Witnesses:

' GEo. E. KIRK,

G. F. DE WEIN.

Qreadily into v 

